What is a Pricing Engine?

Dynamic pricing engine

Adjusts prices in real time based on demand, competition, inventory, or customer segments

E-commerce, retail, travel, hospitality

Pricefx, PROS, Zilliant, Competera

Billing pricing engine (rating engine)

Calculates charges based on usage, entitlements, rate cards, tiers, discounts, and contract terms

SaaS, AI, subscription businesses, telecoms

Solvimon, Zuora, Chargebee, Metronome, Orb, Stripe Billing

1. Event ingestion

Product sends usage events (API calls, tokens, transactions, logins) to the engine

Customer made 47,000 API calls this month

2. Aggregation

Engine groups and aggregates events by customer, metric, and billing period

47,000 calls across 3 product features

3. Rating

Engine applies the rate card: pricing tiers, volume discounts, commitment offsets, credit deductions

First 10K calls free (included in plan), next 25K at $0.01, remaining 12K at $0.008

4. Entitlement check

Verifies what the customer is entitled to based on plan, contract, and overrides

Customer has enterprise override: 15K calls free instead of 10K

5. Calculation

Produces the final charge amounts per line item

Base fee: $500 + Usage: $221 + Tax: $43.26

6. Invoice output

Passes calculated charges to the invoicing system

Invoice #4721 generated for $764.26

Rate card configuration

Define pricing rules (per-unit, tiered, volume, graduated, flat fee) without code

Finance can change pricing without waiting on engineering

Real-time metering

Ingest usage events as they happen, not in batch at end of period

Customers see current usage. You catch anomalies before invoice day

Multi-metric support

Price on multiple dimensions simultaneously (tokens + seats + storage)

AI and hybrid products bill on several metrics at once

Credit and wallet management

Handle prepaid balances, credit drawdown, rollover, and expiry natively

Credits are liabilities. Spreadsheet tracking doesn't survive an audit

Entitlement management

Define what each customer can access based on plan, tier, and overrides

Prevents "deploy code to change packaging" problem

Contract and commitment handling

Support annual commits, minimum spend, volume discounts, ramped pricing

Enterprise deals almost always have custom terms

Multi-entity and multi-currency

Bill across legal entities and currencies from one system

Expanding internationally shouldn't require a new billing stack

Configuration-driven pricing

All pricing logic lives in a configuration layer, not application code

When pricing changes take weeks because they require engineering sprints

Hybrid model support

Handle subscriptions, usage, credits, outcomes, and committed spend in one invoice

When your pricing combines PLG self-serve with SLG enterprise contracts

Revenue recognition integration

Map charges to ASC 606/IFRS 15 recognition schedules automatically

When finance can't close books without manual reconciliation

PLG/SLG bridge

Quote and provision hybrid deals that combine self-serve usage with enterprise terms

When a PLG user converts to an enterprise contract and it takes 6 weeks

Pricing simulation

Model the revenue impact of pricing changes before shipping them

When you need to convince the CFO before changing pricing

Audit trail

Full history of every pricing change, override, and charge calculation

When auditors ask questions your system can't answer

Payment platforms with billing

Simple subscriptions, payment processing, global coverage

Usage-based and hybrid pricing bolted on, not native. Credits require custom code

Solvimon + Adyen, Stripe Billing

Subscription management

Recurring billing, dunning, plan management, churn recovery

Struggle with real-time usage metering and complex hybrid models

Chargebee, Recurly, Maxio

Usage metering specialists

High-volume event ingestion, real-time rating for usage-based products

Metering only. Don't handle contracts, quoting, payments, or full lifecycle

Metronome, Orb, Amberflo

Enterprise billing platforms

Multi-entity, complex contracts, ERP integration

Expensive, slow to implement, usage capabilities lag specialist tools

Zuora

Open-source billing

Transparency, control, customization

Requires engineering to build and maintain. Usage features vary

Lago, Killbill

Monetization infrastructure

Full lifecycle: metering, billing, payments, entitlements, credits, quoting

Newer category

Solvimon